Methods and apparatuses to image particles are described. A plurality of illuminating light beams propagating on multiple optical paths through a particle field are generated. The plurality of illuminating light beams converge at a measurement volume. A shadow image of a particle passing through a portion of the measurement volume at a focal plane of a digital camera is imaged. Shadow images of other particles in the particle field are removed using the plurality of illuminating light beams.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method to image particles, comprising: generating a plurality of illuminating light beams propagating on multiple optical paths through a particle field, wherein the plurality of illuminating light beams are laser beams that converge at a measurement volume; adjusting the plurality of illuminating beams to remove shadow images of particles outside a focal plane of a first digital camera, the focal plane being within the measurement volume; imaging individual shadow images produced by the plurality of converging laser beams; and superposing the individual shadow images to create a composite shadow image of a particle passing through a portion of the measurement volume at the focal plane of the first digital camera.
2. The method of claim 1 , wherein the plurality of illuminating light beams comprise multiple wavelengths.
A system and method for optical inspection involves illuminating a target object with multiple light beams to detect defects or features. The light beams include multiple wavelengths, allowing for enhanced contrast and detection of different material properties or surface characteristics. The system captures reflected or scattered light from the target object using one or more sensors, which may include cameras or photodetectors. The captured data is processed to analyze variations in intensity, phase, or polarization across the wavelengths, enabling precise defect identification or material characterization. The use of multiple wavelengths improves detection accuracy by providing complementary information about the target object's surface or subsurface structure. This technique is particularly useful in semiconductor inspection, where defects such as cracks, particles, or material inconsistencies must be detected with high precision. The system may also include calibration mechanisms to ensure consistent illumination and detection across the different wavelengths. By analyzing the interaction of light at multiple wavelengths with the target object, the system provides a comprehensive inspection solution for quality control in manufacturing processes.
3. The method of claim 1 , further comprising: adjusting a dynamical range of the particles using a plurality of digital cameras.
A method for analyzing particle behavior in a fluid flow involves tracking particles within a fluid stream using a plurality of digital cameras. The method includes capturing images of the particles as they move through the fluid, processing the images to determine particle positions, velocities, and trajectories, and analyzing the data to study fluid dynamics or particle interactions. The method further adjusts the dynamic range of the particles using multiple digital cameras to enhance image quality and accuracy. By capturing images from different angles or exposure settings, the system compensates for variations in particle brightness, size, or motion, ensuring reliable tracking even in challenging conditions. This approach improves the precision of particle velocity measurements and enables detailed analysis of fluid flow characteristics. The method is applicable in fields such as aerodynamics, microfluidics, and environmental monitoring, where understanding particle behavior is critical. The use of multiple cameras allows for better resolution and dynamic range, addressing limitations in single-camera systems that may struggle with high-contrast or fast-moving particles. The system may also include calibration steps to align camera views and synchronize data acquisition, ensuring consistent and accurate results.
4. The method of claim 1 , wherein at least one of the plurality of illuminating light beams is pulsed.
A method for illuminating a target area with multiple light beams, where at least one of the beams is pulsed. The technique involves directing a plurality of light beams toward a target, such as a surface or object, to enhance imaging, sensing, or measurement processes. The pulsed light beam is modulated in time, meaning it is turned on and off at specific intervals, which can improve signal detection, reduce interference, or enable time-resolved measurements. The method may be used in applications like 3D scanning, optical coherence tomography, or machine vision, where precise control of illumination is critical. The pulsed beam can be synchronized with a detector or sensor to capture data at specific moments, improving accuracy and reducing noise. The system may include light sources such as lasers or LEDs, optical components like lenses or mirrors, and control circuitry to manage the timing and intensity of the beams. The pulsed illumination can also help distinguish between different reflections or scattering events, enabling depth mapping or material analysis. The method ensures that the target is illuminated in a controlled manner, optimizing performance for various optical applications.
5. The method of claim 1 , further comprising: determining if the particle is in the measurement volume using a triggering laser beam that is configured to propagate through the measurement volume, wherein the triggering laser beam is scattered by the particle and detected by a photodetector system when the particle is in the measurement volume, and sending a trigger signal to one or more laser sources to generate the plurality of converging laser beams in response to the triggering laser beam that is detected by the photodetector system, to locate the shadow image of the particle in an image frame.
This invention relates to particle analysis, specifically a method for detecting and imaging particles within a measurement volume using laser-based techniques. The method addresses the challenge of accurately locating and capturing shadow images of particles as they pass through a defined measurement region. A triggering laser beam is directed through the measurement volume, and when a particle enters this region, it scatters the triggering laser beam. A photodetector system detects this scattered light, confirming the particle's presence. Upon detection, a trigger signal is sent to one or more laser sources, which then generate a plurality of converging laser beams. These beams intersect at the particle's location, creating a shadow image that is captured in an image frame. The converging laser beams ensure precise illumination of the particle, enabling high-resolution imaging. The method improves particle detection accuracy and imaging efficiency by dynamically triggering the imaging process only when a particle is confirmed to be within the measurement volume. This approach reduces unnecessary data acquisition and enhances the reliability of particle analysis in applications such as flow cytometry or aerosol monitoring.
6. The method of claim 1 , further comprising: detecting the shadow image; evaluating at least one of a depth of field of the particle and a focus of the particle based on the shadow image; and determining a particle information based on the evaluating.
This invention relates to particle analysis, specifically improving the accuracy of particle characterization by analyzing shadow images. The method addresses challenges in accurately determining particle properties, such as depth of field and focus, which are critical for precise measurements in fields like microscopy, fluid dynamics, and material science. The method involves detecting a shadow image of a particle, which is formed when the particle obstructs a light source. The shadow image is then analyzed to evaluate at least one of the particle's depth of field or focus. Depth of field refers to the range of distances within which the particle appears sharp in the image, while focus determines how clearly the particle is resolved. By assessing these parameters, the method refines the particle's spatial and optical properties. The evaluated data is used to determine particle information, such as size, shape, or position. This step ensures that the particle's characteristics are accurately derived from the shadow image, reducing errors caused by defocus or depth variations. The method enhances the reliability of particle analysis systems by incorporating shadow image evaluation, leading to more precise measurements in scientific and industrial applications.
7. The method of claim 1 , further comprising: determining at least one of a size or a shape of the particle based on the shadow image.
This invention relates to particle analysis, specifically determining the size or shape of particles using shadow imaging. The method involves capturing a shadow image of a particle as it passes through a light beam, then analyzing the shadow to extract dimensional or morphological characteristics. The system includes a light source, an imaging sensor, and processing circuitry to interpret the shadow data. The technique is useful in applications like fluid dynamics, material science, or quality control where particle properties must be measured without physical contact. By analyzing the shadow's projection, the method can infer particle dimensions or geometric features, improving accuracy over traditional methods that rely on direct light scattering or diffraction. The approach is particularly valuable for small or fast-moving particles where conventional imaging may be impractical. The system may also incorporate calibration steps to account for lighting conditions or particle orientation, ensuring reliable measurements. This method enhances particle characterization by leveraging shadow imaging, which is less sensitive to surface reflections or transparency issues compared to direct imaging techniques. The invention provides a non-invasive, high-resolution way to assess particle properties in real-time.
8. The method of claim 1 , further comprising: synchronizing the plurality of illuminating light beams with the first digital camera.
A system and method for capturing high-resolution images using structured light illumination involves projecting a plurality of illuminating light beams onto an object to enhance image capture. The light beams are modulated to create a structured light pattern, which improves the visibility of surface details and reduces noise in the captured images. A first digital camera captures images of the object under this structured illumination, while a second digital camera captures reference images without the structured light. The captured images are processed to extract high-resolution details by combining information from both the structured and reference images. The method further includes synchronizing the plurality of illuminating light beams with the first digital camera to ensure precise timing between illumination and image capture, improving the accuracy of the structured light pattern and the resulting image quality. This synchronization helps mitigate motion artifacts and ensures consistent illumination across multiple exposures. The technique is particularly useful in applications requiring high-resolution imaging, such as industrial inspection, medical imaging, or scientific research, where fine surface details must be accurately captured.
9. The method of claim 1 , wherein the plurality of illuminating light beams are converged using one or more axicons.
This invention relates to optical systems for generating and controlling light beams, particularly for applications requiring precise beam shaping and convergence. The problem addressed is the need for efficient and accurate convergence of multiple light beams to achieve a desired intensity distribution or focal pattern, which is challenging with conventional optical elements. The invention describes a method where a plurality of illuminating light beams are converged using one or more axicons. An axicon is a conical lens that transforms a collimated input beam into a ring-shaped output beam or converges light into a line focus. By employing one or more axicons, the system can precisely control the convergence of multiple beams, enabling applications such as laser material processing, optical trapping, or high-resolution imaging. The axicons may be arranged in series or in combination with other optical elements to further refine the beam properties, such as beam diameter, divergence, or focal length. The method ensures that the converged beams maintain desired characteristics, such as uniform intensity or minimal aberrations, across the target area. This approach improves beam control and efficiency compared to traditional focusing methods, making it suitable for advanced optical applications.
10. The method of claim 1 , further comprising: adjusting at least one of a quantity of the illuminating light beams, and a light beam wavelength to remove shadow images of the particles outside the measurement volume.
This invention relates to optical measurement systems used to analyze particles in a fluid, such as in flow cytometry or particle imaging applications. The problem addressed is the presence of shadow images or artifacts caused by particles outside the intended measurement volume, which can distort measurement accuracy. The method involves illuminating particles with multiple light beams to detect and analyze them within a defined measurement volume. To mitigate shadow artifacts, the system adjusts either the number of illuminating light beams or their wavelengths. By modifying these parameters, the system reduces or eliminates the interference caused by particles outside the measurement volume, ensuring more accurate detection and analysis of the particles within the intended region. This adjustment can be dynamically applied based on real-time data or predefined calibration settings to optimize measurement precision. The technique is particularly useful in high-resolution particle analysis where minimizing background noise and artifacts is critical.
11. The method of claim 1 , further comprising: determining a delay between the plurality of the illuminating laser light beams to obtain an information about the particle.
A method for analyzing particles using multiple laser light beams involves illuminating a particle with a plurality of laser light beams, each having a distinct wavelength. The method further includes detecting scattered light from the particle in response to the illumination and analyzing the detected scattered light to determine properties of the particle, such as size, composition, or velocity. To enhance the analysis, the method incorporates a step of determining a delay between the plurality of laser light beams. This delay measurement provides additional information about the particle, such as its velocity or position, by analyzing the time differences between the interactions of the particle with each laser beam. The technique is particularly useful in applications like flow cytometry, aerosol monitoring, or industrial particle analysis, where precise characterization of particles is required. The method improves accuracy by leveraging temporal differences in laser interactions to extract more detailed particle data.
12. A non-transitory machine-readable medium comprising data that when accessed by a data processing system, cause the data processing system to perform a method to image particles comprising: generating a plurality of illuminating light beams propagating on multiple optical paths through a particle field, wherein the plurality of illuminating light beams are laser beams converging at a measurement volume; adjusting the plurality of illuminating beams to remove shadow images of particles outside a focal plane of a first digital camera, the focal plane being within the measurement volume; imaging individual shadow images produced by the plurality of converging laser beams; and superposing the individual shadow images to create a composite shadow image of a particle present through a portion of the measurement volume at the focal plane of the first digital camera.
This invention relates to particle imaging systems, specifically addressing the challenge of accurately imaging particles within a measurement volume while minimizing interference from out-of-focus particles. The system uses multiple converging laser beams to illuminate a particle field, with the beams intersecting at a measurement volume where particles are present. A first digital camera captures shadow images of particles within its focal plane, which lies within the measurement volume. To prevent shadow artifacts from particles outside this focal plane, the system adjusts the illuminating beams to ensure only particles within the focal plane contribute to the captured images. The system then images individual shadow projections created by the converging laser beams and combines these projections to form a composite shadow image of a particle. This composite image provides a clear representation of the particle's structure as it passes through the measurement volume, improving accuracy in particle analysis. The method enhances imaging resolution by isolating in-focus particles while suppressing out-of-focus interference, making it useful in applications like fluid dynamics, aerosol research, and industrial process monitoring.
13. The non-transitory machine-readable medium of claim 12 , wherein the plurality of illuminating light beams comprise multiple wavelengths.
The invention relates to a non-transitory machine-readable medium storing instructions for generating and analyzing light beams in a system, particularly for applications requiring precise illumination and detection. The system addresses challenges in optical measurement and imaging where single-wavelength light sources may lack sufficient resolution or contrast, limiting accuracy in tasks such as material analysis, defect detection, or biological imaging. The medium includes instructions for controlling a light source to emit a plurality of illuminating light beams, where these beams comprise multiple wavelengths. This multi-wavelength approach enhances the system's ability to distinguish between different materials or features by leveraging the unique absorption, reflection, or scattering properties of each wavelength. The system may also include a detector configured to capture responses from the illuminated target, with the captured data processed to extract detailed information based on the multi-wavelength interactions. The instructions further enable calibration and adjustment of the light source to ensure consistent beam quality and alignment, improving measurement reliability. The system may also incorporate feedback mechanisms to dynamically optimize illumination parameters in real-time, adapting to varying environmental or target conditions. This adaptability is particularly useful in industrial or scientific applications where precision and repeatability are critical. By utilizing multiple wavelengths, the system overcomes limitations of single-wavelength systems, providing higher resolution, better contrast, and more comprehensive data for analysis. This enhances the accuracy of tasks such as defect detection, material characterization, or biological ima
14. The non-transitory machine-readable medium of claim 12 , further comprising instructions to cause the data processing system to perform operations comprising: adjusting a dynamical range of the particles using a plurality of digital cameras.
This invention relates to a system for analyzing particles, such as cells or other microscopic objects, using digital imaging techniques. The problem addressed is the difficulty in accurately capturing and analyzing particles with varying brightness or contrast levels, which can lead to poor data quality in imaging-based analysis. The system includes a data processing apparatus configured to control multiple digital cameras to capture images of particles. The cameras are synchronized to capture images simultaneously or in rapid succession, allowing for the collection of multiple perspectives or exposure levels. The system adjusts the dynamic range of the captured images by processing the data from the multiple cameras, enhancing the visibility of particles that may be too bright or too dim in a single exposure. This adjustment improves the accuracy of subsequent analysis, such as particle counting, classification, or tracking. The system may also include a calibration module to ensure consistent imaging conditions across the cameras, and an image processing module to merge or compare the images from different cameras. The use of multiple cameras with different exposure settings or spectral sensitivities allows for a broader range of particle characteristics to be captured, improving the overall quality of the analysis. This approach is particularly useful in biological or medical applications where precise particle imaging is critical.
15. The non-transitory machine-readable medium of claim 12 , wherein at least one of the plurality of illuminating light beams is pulsed.
A system for optical inspection or imaging uses multiple light beams to illuminate a target object, with at least one of the beams being pulsed. The pulsed illumination allows for time-resolved measurements, such as capturing dynamic events or reducing motion blur. The system may include a light source array generating the beams, a controller modulating the beams, and a sensor detecting reflected or transmitted light. The pulsed beam can be synchronized with the sensor to enhance signal-to-noise ratio or enable depth profiling. This technique is useful in applications like microscopy, industrial inspection, or biomedical imaging where precise timing of illumination improves measurement accuracy. The system may also include beam shaping optics to focus or direct the beams onto specific regions of the target. The pulsed illumination can be combined with continuous-wave beams for multi-modal imaging, where different beams provide complementary information. The controller adjusts pulse parameters like duration, frequency, or intensity to optimize the inspection process for the target material or application. This approach improves the system's ability to capture high-resolution or high-speed data while minimizing interference from ambient light or unwanted reflections.
16. The non-transitory machine-readable medium of claim 12 , further comprising instructions to cause the data processing system to perform operations comprising: determining if the particle is in the measurement volume using a triggering laser beam that is configured to propagate through the measurement volume, wherein the triggering laser beam is scattered by the particle and detected by a photodetector system when the particle is in the measurement volume, and sending a trigger signal to one or more laser sources to generate the plurality of converging laser beams in response to the triggering laser beam that is detected by the photodetector system, to locate the shadow image of the particle in an image frame.
This invention relates to a system for detecting and imaging particles using laser beams. The problem addressed is accurately locating and capturing shadow images of particles within a measurement volume, which is challenging due to the transient nature of particle movement. The system uses a triggering laser beam that propagates through the measurement volume. When a particle enters the measurement volume, the triggering laser beam is scattered by the particle and detected by a photodetector system. Upon detection, a trigger signal is sent to one or more laser sources, which then generate a plurality of converging laser beams. These converging beams are used to illuminate the particle, allowing its shadow image to be captured in an image frame. The triggering mechanism ensures that the particle is within the measurement volume when the imaging laser beams are activated, improving the accuracy and reliability of particle detection and imaging. The system is particularly useful in applications requiring precise particle analysis, such as in fluid dynamics, environmental monitoring, or industrial process control. The use of a triggering laser beam and photodetector system enables real-time detection and imaging, reducing errors caused by particle movement outside the measurement volume.
17. The non-transitory machine-readable medium of claim 12 , further comprising instructions to cause the data processing system to perform operations comprising: detecting the shadow image; evaluating at least one of a depth of field of the particle and a focus of the particle based on the shadow image; and determining a particle information based on the evaluating.
This invention relates to particle analysis using shadow imaging techniques. The system captures a shadow image of a particle and processes the image to extract key information about the particle. The process involves detecting the shadow image of the particle, then evaluating either the depth of field or the focus of the particle within the image. By analyzing these parameters, the system determines particle information, such as size, shape, or other characteristics. The method leverages shadow imaging to provide non-invasive, high-resolution particle analysis, which is useful in fields like microscopy, fluid dynamics, and material science. The system may also include additional steps such as capturing the shadow image using a light source and an imaging device, and preprocessing the image to enhance clarity before analysis. The focus or depth of field evaluation helps distinguish particle features that may otherwise be obscured in standard imaging techniques. This approach improves accuracy in particle characterization by reducing errors caused by lighting variations or background noise. The invention is particularly useful in applications requiring precise particle measurements, such as quality control in manufacturing or environmental monitoring.
18. The non-transitory machine-readable medium of claim 12 , further comprising instructions to cause the data processing system to perform operations comprising: determining at least one of a size or a shape of the particle based on the shadow image.
This invention relates to particle analysis systems that use shadow imaging to determine particle characteristics. The technology addresses the challenge of accurately measuring particle size and shape in industrial, scientific, or medical applications where precise particle analysis is critical. Traditional methods often struggle with accuracy, especially for irregularly shaped particles or those in dynamic environments. The system captures a shadow image of a particle as it passes through a light beam or other illumination source. The captured image is processed to extract dimensional and morphological features. The invention includes a machine-readable medium containing instructions for a data processing system to analyze the shadow image and determine at least one of the particle's size or shape. The analysis may involve image processing techniques such as edge detection, pixel counting, or pattern recognition to quantify dimensions or geometric properties. The system may also compare the particle's shadow against reference profiles to classify its shape or identify irregularities. The invention improves upon prior art by providing a more automated and precise method for particle characterization, reducing human error and increasing throughput in applications like pharmaceutical manufacturing, environmental monitoring, or material science. The system can be integrated into existing imaging setups or deployed as a standalone analysis tool. The focus on shadow imaging ensures compatibility with high-speed particle analysis while maintaining accuracy.
19. The non-transitory machine-readable medium of claim 12 , further comprising instructions to cause the data processing system to perform operations comprising: synchronizing the plurality of illuminating light beams with the first digital camera.
A system and method for synchronizing multiple light sources with a digital camera to enhance imaging or sensing applications. The technology addresses challenges in capturing high-quality images or data when using multiple light sources, such as flickering, misalignment, or timing inconsistencies that degrade image quality or sensor performance. The invention involves a non-transitory machine-readable medium containing instructions that, when executed by a data processing system, synchronize a plurality of illuminating light beams with a first digital camera. This synchronization ensures that the light sources and camera operate in a coordinated manner, improving image clarity, reducing artifacts, and enhancing the accuracy of captured data. The system may also include additional components, such as a second digital camera, to further refine imaging or sensing capabilities. The synchronization process may involve timing adjustments, phase alignment, or other control mechanisms to ensure precise coordination between the light sources and the camera. This technology is applicable in fields such as medical imaging, industrial inspection, scientific research, and advanced imaging systems where precise illumination control is critical.
20. The non-transitory machine-readable medium of claim 12 , wherein the plurality of illuminating light beams are converged using one or more axicons.
The invention relates to optical systems for generating and controlling light beams, particularly for applications requiring precise beam shaping and convergence. The problem addressed is the need for efficient and accurate convergence of multiple light beams to achieve desired illumination patterns, such as those used in microscopy, laser processing, or optical sensing. The invention involves a non-transitory machine-readable medium storing instructions that, when executed, configure a system to generate and control a plurality of illuminating light beams. The system includes a light source and an optical arrangement that produces multiple light beams. A key feature is the use of one or more axicons to converge these beams. Axicons are conical lenses that transform collimated light into a ring-shaped beam or a high-intensity central spot, depending on their design. By employing axicons, the system can precisely control the convergence of the beams, enabling applications that require focused or ring-shaped illumination patterns. The optical arrangement may include additional components such as beam splitters, mirrors, or lenses to further shape or direct the beams. The system can dynamically adjust the convergence properties of the beams based on input parameters, allowing for real-time optimization of the illumination pattern. This capability is particularly useful in adaptive optical systems where precise control of light distribution is critical. The invention improves upon prior art by providing a more efficient and flexible method for converging multiple light beams using axicons, enhancing performance in various optical applications.
21. The non-transitory machine-readable medium of claim 12 , further comprising instructions to cause the data processing system to perform operations comprising: adjusting at least one of a quantity of the illuminating light beams, and a light beam wavelength to remove shadow images of the particles outside the measurement volume.
This invention relates to optical particle measurement systems, specifically addressing the challenge of shadow artifacts in particle imaging. The system uses multiple light beams to illuminate particles within a defined measurement volume, but stray light or reflections can create shadow images of particles outside this volume, distorting measurements. The invention improves accuracy by dynamically adjusting either the number of illuminating light beams or their wavelengths to eliminate these shadow artifacts. By modifying the illumination parameters, the system ensures that only particles within the intended measurement volume are detected, reducing measurement errors caused by extraneous shadows. The adjustment can be based on real-time analysis of detected particle images or predefined calibration data. This approach enhances the precision of particle size, shape, or concentration measurements in applications such as fluid dynamics, environmental monitoring, or industrial process control. The system may also include additional features like beam steering or intensity modulation to further refine the measurement process. The invention is particularly useful in high-precision optical measurement systems where shadow artifacts can significantly impact data integrity.
22. The non-transitory machine-readable medium of claim 12 , further comprising instructions to cause the data processing system to perform operations comprising: determining a delay between the plurality of the illuminating laser light beams to obtain an information about the particle.
This invention relates to a non-transitory machine-readable medium storing instructions for analyzing particles using multiple illuminating laser light beams. The system addresses the challenge of accurately characterizing particles in a sample by leveraging time-delayed laser beams to extract detailed information about the particles. The medium includes instructions for a data processing system to determine the delay between multiple laser beams, enabling the extraction of particle properties such as size, composition, or velocity. The system may also include instructions for generating the laser beams, detecting scattered or transmitted light, and processing the detected signals to derive particle information. By analyzing the time delay between the beams, the system can improve the accuracy and resolution of particle characterization compared to single-beam methods. The invention is particularly useful in fields like flow cytometry, environmental monitoring, and industrial quality control, where precise particle analysis is critical. The medium may also include instructions for calibrating the system, compensating for environmental factors, and optimizing beam parameters to enhance measurement reliability. The overall approach provides a robust solution for high-precision particle analysis in various scientific and industrial applications.
23. An apparatus to image particles, comprising: a transmitter comprising one or more laser sources to generate a plurality of illuminating light beams propagating on multiple optical paths through a particle field, wherein the plurality of illuminating light beams are laser beams converging at a measurement volume; a receiver coupled to the transmitter, the receiver comprising a photodetector system; an imaging optics; and a first digital camera coupled to the imaging optics to provide a composite shadow image of a particle passing through the measurement volume at a focal plane of the first digital camera using the plurality of converging laser beams, wherein the composite shadow image is a superposition of individual shadow images produced by the converging laser beams, wherein an intersection angle of the plurality of illuminating light beams is adjusted to remove shadow images of other particles outside the focal plane from the composite shadow image; and a processor coupled to least one of the transmitter and the receiver.
This invention relates to particle imaging systems, specifically addressing the challenge of capturing clear images of individual particles in a field while minimizing interference from out-of-focus particles. The apparatus includes a transmitter with one or more laser sources generating multiple converging laser beams that intersect at a measurement volume. These beams propagate along distinct optical paths through a particle field, creating a composite shadow image of a particle passing through the measurement volume. The composite image is formed by superimposing individual shadow images produced by each converging laser beam. The intersection angle of the laser beams is adjustable to eliminate shadow images of particles outside the focal plane, ensuring only the target particle is clearly imaged. The system also includes a receiver with a photodetector system, imaging optics, and a digital camera that captures the composite shadow image at its focal plane. A processor is coupled to the transmitter and/or receiver to analyze the captured data. This design enhances particle imaging resolution by reducing background noise from out-of-focus particles, improving accuracy in applications such as fluid dynamics or aerosol research.
24. The apparatus of claim 23 , wherein the plurality of illuminating light beams comprise multiple wavelengths.
This invention relates to an apparatus for illuminating a target area with multiple light beams, addressing the need for enhanced imaging or sensing capabilities in applications such as microscopy, medical diagnostics, or industrial inspection. The apparatus generates a plurality of illuminating light beams, each having distinct wavelengths, to improve contrast, resolution, or spectral analysis of the target. The multiple wavelengths enable simultaneous or sequential illumination, allowing for multi-spectral imaging or detection of different material properties. The apparatus may include a light source module configured to produce beams at different wavelengths, such as lasers or LEDs, and an optical system to direct and focus these beams onto the target. The system may also incorporate beam splitting, combining, or modulation components to control the wavelength-specific illumination. By using multiple wavelengths, the apparatus can overcome limitations of single-wavelength systems, such as reduced contrast or inability to distinguish between similar materials. The invention is particularly useful in applications requiring high-resolution imaging, spectral analysis, or multi-modal sensing, where wavelength diversity enhances the accuracy and versatility of the system.
25. The apparatus of claim 23 , further comprising: one or more second digital cameras coupled to the first digital camera to adjust a dynamic range of the particles.
The invention relates to an imaging apparatus designed to capture high-dynamic-range images of particles, such as those in fluid flows or other environments where contrast and visibility are challenging. The apparatus includes a primary digital camera for capturing images of the particles and one or more secondary digital cameras that work in conjunction with the primary camera to enhance the dynamic range of the captured images. By using multiple cameras, the system can capture details in both bright and dark regions of the scene, improving the visibility of particles that might otherwise be obscured due to lighting conditions or sensor limitations. The secondary cameras may operate at different exposure settings or capture complementary data to expand the overall dynamic range of the final image. This approach is particularly useful in scientific, industrial, or medical applications where accurate particle imaging is critical for analysis. The apparatus may also include additional components, such as lighting systems or processing units, to further refine the imaging process. The use of multiple cameras ensures that the captured images provide a more comprehensive and accurate representation of the particles, addressing the problem of limited dynamic range in single-camera systems.
26. The apparatus of claim 23 , wherein at least one of the plurality of illuminating light beams is pulsed.
This invention relates to an apparatus for illuminating a target area using multiple light beams, with at least one of the beams being pulsed. The apparatus addresses the challenge of achieving precise and controlled illumination in applications such as imaging, sensing, or material processing, where traditional continuous light sources may lack the necessary temporal resolution or intensity modulation. By incorporating pulsed illumination, the apparatus enables time-resolved measurements, reduces interference from ambient light, and enhances signal-to-noise ratios in detection systems. The pulsed beam can be synchronized with a detection system to capture transient events or improve measurement accuracy. The apparatus may include additional features such as beam shaping optics, wavelength selection mechanisms, or adaptive focusing to further optimize illumination characteristics. The pulsed light source can be a laser, LED, or other coherent or incoherent light emitter, depending on the application requirements. This design is particularly useful in fields like microscopy, spectroscopy, or industrial inspection, where precise temporal control of illumination is critical. The apparatus may also include feedback mechanisms to adjust pulse parameters dynamically, ensuring consistent performance across varying environmental conditions.
27. The apparatus of claim 23 , wherein the transmitter comprises a trigger light source to send a triggering laser beam that is configured to propagate through the measurement volume, wherein the triggering laser beam is scattered by the particle and detected by the photodetector system when the particle is in the measurement volume, wherein the photodetector system is configured send a trigger signal to the one or more laser sources to generate the plurality of converging laser beams in response to detecting the triggering laser beam, to locate the shadow image of the particle in an image frame.
This invention relates to particle measurement systems, specifically apparatus for detecting and analyzing particles in a measurement volume using laser-based imaging. The system addresses the challenge of accurately locating and imaging particles in a fluid or gas flow by using a triggering mechanism to synchronize laser illumination with particle detection. The apparatus includes a transmitter with a trigger light source that emits a triggering laser beam propagating through the measurement volume. When a particle enters the volume, it scatters the triggering laser beam, which is detected by a photodetector system. Upon detection, the photodetector system sends a trigger signal to one or more laser sources, which then generate a plurality of converging laser beams. These beams intersect at the particle's location, creating a shadow image of the particle in an image frame. The system ensures precise timing between particle detection and laser illumination, enabling accurate particle imaging and analysis. The triggering mechanism improves measurement efficiency by activating the main laser sources only when a particle is present, reducing unnecessary energy consumption and data processing. This approach is particularly useful in applications requiring high-resolution particle characterization, such as aerosol research, fluid dynamics, and environmental monitoring.
28. The apparatus of claim 23 , wherein the processor is configured to detect the shadow image, to evaluate at least one of a depth of field of the particle and a focus of the particle based on the shadow image, to determine a particle information based on the evaluation.
This invention relates to particle analysis systems, specifically improving the detection and evaluation of particles in imaging systems. The problem addressed is accurately determining particle characteristics, such as depth of field and focus, which are critical for precise analysis but challenging to measure in real-time imaging systems. The apparatus includes an imaging system that captures a shadow image of a particle. A processor analyzes this shadow image to evaluate at least one of the particle's depth of field or focus. Depth of field refers to the range of distances within which the particle appears sharp in the image, while focus measures how well the particle is in focus. The processor then determines particle information based on this evaluation, which may include size, shape, or other relevant properties. The imaging system may use techniques such as light scattering or shadowgraphy to generate the shadow image. The processor applies algorithms to assess the shadow's characteristics, such as contrast, edge sharpness, or intensity distribution, to derive depth and focus metrics. This information is then used to refine particle analysis, ensuring accurate measurements even in dynamic environments. The invention improves upon prior systems by providing a more reliable method for assessing particle focus and depth, which is essential for applications in fluid dynamics, aerosol research, or industrial quality control. By leveraging shadow imaging, the system avoids complex optical setups while maintaining high precision.
29. The apparatus of claim 23 wherein the processor is configured to determine at least one of a size or a shape of the particle based on the shadow image.
This invention relates to particle analysis systems that use shadow imaging to determine particle characteristics. The problem addressed is the need for accurate and efficient measurement of particle size and shape in industrial, medical, or research applications where traditional imaging methods may be limited by resolution, speed, or cost. The apparatus includes an imaging system that captures a shadow image of a particle as it passes through a light beam. A processor analyzes the shadow image to extract dimensional and morphological features. The processor is configured to determine at least one of the particle's size or shape from the shadow data. The system may also include a light source, a detector array, and a fluidic channel to position particles for imaging. The processor may apply image processing techniques such as edge detection, thresholding, or pattern recognition to interpret the shadow profile. The invention improves upon prior art by providing a non-invasive, high-throughput method for particle characterization without requiring complex optical setups or direct particle contact. Applications include quality control in manufacturing, environmental monitoring, and biological sample analysis. The system may be integrated into existing particle analysis workflows or used as a standalone diagnostic tool.
30. The apparatus of claim 23 , further comprising: a synchronization module to synchronize the plurality of illuminating light beams with the first digital camera.
This invention relates to an apparatus for capturing high-resolution images or video using multiple light sources and a camera. The problem addressed is the need for improved illumination control in imaging systems to enhance image quality, particularly in low-light or high-contrast environments. The apparatus includes a plurality of illuminating light beams directed toward a target scene, a first digital camera configured to capture images of the scene, and a synchronization module. The synchronization module ensures that the plurality of illuminating light beams are precisely synchronized with the first digital camera's operation. This synchronization prevents motion blur and ensures consistent lighting conditions across multiple exposures, improving image clarity and detail. The apparatus may also include additional components, such as a second digital camera for stereo imaging or depth sensing, and a processing unit to combine or analyze the captured data. The synchronized illumination and imaging process enables high-resolution, high-contrast imaging in challenging lighting conditions.
31. The apparatus of claim 23 , further comprising: one or more axicons to converge the plurality of illuminating light beams.
This invention relates to optical systems for converging multiple light beams, particularly in applications requiring precise beam shaping or focusing. The problem addressed is the need for efficient and accurate convergence of multiple light beams, which is critical in fields such as laser processing, optical metrology, and high-resolution imaging. The apparatus includes one or more axicons, which are conical or wedge-shaped optical elements, to converge a plurality of illuminating light beams. Axicons are used to transform incident collimated light into a ring-shaped or annular beam, which can then be further manipulated for specific applications. The apparatus may also include other components, such as beam splitters or collimators, to generate and align the multiple light beams before they interact with the axicons. The converged beams can be used for tasks like material processing, optical trapping, or high-precision measurement. The use of axicons allows for precise control over the convergence angle and focal length of the beams, enabling tailored beam profiles for different applications. This design improves beam quality and efficiency compared to traditional focusing methods, particularly when working with multiple beams. The apparatus is adaptable to various optical systems where controlled beam convergence is required.
32. The apparatus of claim 23 , wherein at least one of a quantity of the illuminating light beams, and a light beam wavelength is adjusted to remove shadow images of the particles outside the measurement volume.
This invention relates to an apparatus for particle measurement, specifically addressing the challenge of shadow artifacts in optical detection systems. The apparatus includes a light source that generates multiple illuminating light beams directed toward a measurement volume where particles are present. The system detects scattered or transmitted light from these particles to analyze their properties. A key issue in such systems is the formation of shadow images of particles outside the measurement volume, which can distort measurements. To mitigate this, the apparatus adjusts either the number of illuminating light beams or their wavelengths to eliminate these shadow artifacts. By dynamically modifying these parameters, the system ensures that only particles within the intended measurement volume contribute to the detected signal, improving measurement accuracy. The light source may include lasers or other coherent light emitters, and the adjustment mechanism can be controlled electronically or mechanically. This approach enhances the reliability of particle analysis in applications such as fluid dynamics, environmental monitoring, or industrial process control.
33. The apparatus of claim 23 , wherein a delay between the plurality of the illuminating laser light beams is determined to obtain an information about the particle.
This invention relates to a laser-based particle analysis system designed to measure properties of particles in a sample. The system addresses the challenge of accurately characterizing particles, such as their size, velocity, or composition, by using multiple laser light beams to interrogate the particles as they pass through the measurement region. The apparatus includes a laser source that generates a plurality of illuminating laser light beams, which are directed toward the sample. The beams are arranged such that they interact with particles in the sample at different times, creating a time delay between interactions. By analyzing the delay between the beams' interactions with a particle, the system can derive information about the particle, such as its velocity or size. The apparatus may also include detectors to capture the scattered or transmitted light from the particles, and processing circuitry to analyze the signals and determine the particle properties. The system is particularly useful in applications requiring high-precision particle characterization, such as environmental monitoring, pharmaceutical analysis, or industrial process control. The key innovation lies in the controlled timing of the laser beams to extract particle information from the delay between interactions.
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February 11, 2020
April 12, 2022
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